Outboard motor



` April 11, 1939. w. V KlssEL 2,153,626

OUTBOARD MOTOR fw, MEW/14%@ Klamme@ Patente-cl Apr. 11, 1939 UNITED STATES PATENT OFFICE 2,153,626 oUTBoARn Moron tries, Hartford, Wis.

Application May 10, 1937, Serial No. 141,743

6 Claims.

The invention relates generally to outboard motors and more particularly to an underwater unit for an outboard motor.

The general object of the invention is to prosa vide an underwater unit for an outboard motor,

including a water pump as a unitary part thereof, the pump being of a relatively simple construction which may be readily removed to give free access to the parts thereof and to the asl.) sociated Water passages. v

Y Another object is to provide a new and improved underwater unit having a pump of a type which is driven by the engine and will deliver a sufficient supply of water at the lowest engine l speeds and without dependence upon movement of the unit through the water.

It is also an object to provide an underwater unit having a pump of the rotatably driven sliding vane type, the rotating member comprising a portion of the gearing for driving the propeller shaft housed within the unit.

Still another object is to provide a pump of the sliding vane type housed within a removable portion of the underwater unit, said removable portion being held in place merely by .a pair of screws, and the pump being removable from said portion by a simple withdrawing movement whereby the pump may readily be completely disassembled for purposes of cleaning or repair.

A still further object is to provide an underwater` unit of generally streamline contour with the front or nose portion thereof constituting a removable housing for a rotary type of pump driven by gearing housed in the main body portion of the unit.

Other objects and advantages will become apparent from the following description taken in connection with the accompanying drawings, in which:

Figure l is a side elevational view of a portion of .an outboard motor embodying the features of the invention.

Fig. 2 is a front view of the portion shown in Fig. 1.

Fig. 3 is a vertical section taken on the line 3-3 of Fig, 2.

Fig. 4 is a vertical transverse'section taken on the line 4--4 of Fig. 3.

Fig. 5 is a horizontal section taken on the line 5-5 of Fig. 3.

Fig. 6 is a front face view of the-underwater unit with the nose piece and pump removed.

Fig. 7 is a horizontal section taken on the line 'l--l of Fig. 1.

Fig. 8 is a fragmentary section taken on the broken line 8--8 of Fig. 4.

Fig. 9 is a fragmentary section taken on` the line 9-9 of Fig. 4.

Fig. l0 is an inside view of the nose piece with the pump removed.

'I'he invention is embodied in an underwater unit for an outboard motor, the unit being generally streamlined on its exterior and including a water pump for supplying water to the motor. The principal feature of the invention resides in the provision of a pump of simple construction, but one which will readily deliver water independently of the movement of the unit through the water. The pump and underwater unit are so constructed that all parts of the usual gearing housed within the unit, as well as all parts of the pump and its related water passages, are readily accessible.

To this end, the underwater unit comprises a body portion suspended from a vertical drive shaft casing and constituting a housing for gearing connecting the vertical drive shaft and a horizontal propeller shaft. Mounted on the front of the body portion and constituting a closure therefor is .a nose piece. A rotary pump preferably of the sliding vane type is housed within the nose piece and utilizes a portion of the gearing as the rotatable member of the pump. A water inlet is formed in the front end of the nose piece and an outlet is provided therein connecting with a water passage in the body portion.

The pump and nose piece are so constructed that the means for attaching the nose piece to the body portion constitutes the means for holding the parts of the pump in assembled relation and in operative relation tot the gearing. When the nose piece is removed from the body portion, all parts of the pump may be readily removed from the nose piece and the gearing may be removed rom the body portion. Moreover, the various water passages are thereby rendered laccessible.

As shown in the drawings, the body portion of the underwater unit, indicated generally at 20, is suspended from a vertical drive shaft casing 2| enclosing a drive shaft 22. To secure the body portion 20 to the drive shaft casing, an upwardly extending sleeve 23 on the body portion is teler scoped into the lower end of the drive shaft casing. In the lower part of the body portion is a chamber I9 for housing gearing connecting the drive shaft 22 with a propeller shaft 24. To permit the drive shaft 22 to extend into the chamber, a vertical bore is provided in the body portion.

The propeller shaft 24 is supported in a bearing 26 extending forwardly from the rear wall of the body portion. The propeller shaft projects beyond the rear end of the body portion to receive a propeller 21 thereon. The forward end of the propeller shaft extends beyond the bearing 26 and has a bevel gear 3|] secured thereon and meshing with a bevel pinion 3| mounted on the lower end of the drive shaft 22. The bevel gear 30 has a hub portion 32 projecting forwardly beyond the body portion, the front end of the chamber I9 being open so that the bevel gears and propeller shaft may be removed therefrom through said opening.

In order to provide a closure for the chamber I9, a nose piece 33 is provided which conforms in shape to the streamlining of the body portion. The nose piece is hollow and serves as a housing for a pump of the rotary type which is preferably a sliding vane pump.

The pump comprises a pump body 34 mounted in the nose piece 33 and embracing the front end of the bevel gear hub 32. The pump body 34 is cup-shape to provide a chamber 35 into which the hub 32 of the bevel gear extends, the chamber 35 being eccentric to the hub 32. The hub 32 is provided with a transverse slot 36 in which a vane 31 is slidably mounted so that its ends may remain in contact with the wall of the pump chamber 35 as the hub rotates, the width of the chamber being equal to the length of the vane 31.

The pump chamber 35 has ra pair of peripheral openings 40, one constituting an inlet and the other an outlet, s o that the sliding vane 31 will force water from one to the other upon rotation of the bevel gear 3U. 'I'he peripheral opening 40 constituting the inlet connects with a forwardly extending bore 4I in the pump body providing communication with the interior of the nose piece 33 to draw water therefrom. Water is permitted to enter the interior of the nose piece through an aperture 42 formed centrally in the front end of the nose piece. To strengthen the nose piece, a vertically positioned partition 43 extends transversely across the opening 42. To strain the water entering the nose piece 33, a screen 44 is mounted across the opening 42 and is held in place by a retaining washer 45 secured in the nose piece by burring the edge of the nose piece at a plurality of points.

The peripheral opening 40 constituting the outlet for the pump communicates with a vertically extending bore in the pump body, which alines with a passage in the nose piece. The passage in the nose piece is formed by drilling a substantially vertically extending bore 5I and a rearwardly slanting bore 52 opening at the rear face of the nose piece.

Extending from the front face of the body portion rearwardly is a passage 53 which is alined with the opening of the bore 52 inthe nose piece, and which is located at one side of the drive shaft bore 25 in the body portion. The passage 53 has at its rear end an angular portion 54 communicating with a centrally located vertically extending bore 55 in which a pipe fitting 56 is mounted. Attached to the pipe fitting 56 is a water pipe 51 extending upwardly at the rear of the drive shaft casing for connection with the motor. Y

The rear face of the pump body 34 is closed by an annular cover 60 fitting snugly around the chamber |9.

To hold the parts of the pump against rotation and in assembled relation with the nose piece, the latter is provided with a pair of bosses 63 on its interior which are drilled to receive a pair of rearwardly extending pins 64. lThe pins 64 extend through the pump body, the pump body cap 60 and into the packing ring retainer 6I. To secure the nose piece 33 rigidly to the body portion 20, a pair of screws; 65 extend through s the upper and lower portions of the nose piece 33 and are threaded into the body portion.

In operation, water flows into the interior of the nose piece 33 through the opening 42 in the front end thereof from whence it is drawn into the pump through the bore 4I. The rotation of the bevel gear 30 carrying the sliding vane 31 carries the water around within the pump chamber 35, due to the eccentricity of the gear hub 32 relative to the chamber 35, and forces it out through the bore 50 in the pump body and the bores 5| and 52 in the nose piece. The water then flows rearwardly through the passage 53 in the body portion and thence upwardly through the water pipe 51.

Should the pump get out of order, all the parts may be readily disassembled merely by removing the two screws` 65. When these two screws are removed, the nose piece, together with the pump body 34, the pump body cover 6U, and the retaining ring 6I, may be separated from the body portion 20. The sliding vane 31 may also be removed from its slot in the hub of the bevel gear 30. 'I'he retaining ring 6|, the pump body cover, and the pump body 34 may then be removed from the nose piece by sliding them off the two pins 64. With the pump parts removed from the nose piece, the bores 5| and 52 are readily accessible, as well as the screen 44 and its retainer ring 45. 'I'he passage 53 is also accessible. When the nose piece 33 and the pump parts have been removed, the propeller shaft, together with its bevel gear 30, may be pulled forwardly out of the chamber I9, and the bevel pinion 3| on the lower end of the drive shaft can then be detached from the drive shaft and removed through the forward end of the body portion.

To reassemble the unit, the packing ring retainer 6I and the pump body cover 60 may be placed on the hub 32 of the bevel gear, and the sliding vane 31 may be inserted in the slot 36 in the end of the hub.. The pump body 34 may then be inserted in the nose piece, and the two together put in place on the body portion 20, the pins 64 being inserted in the cover 60 and retainer 6I. The two screws 65 then will hold all parts in place.

From the foregoing, it will be apparent that I have provided an underwater unit embodying a pump of simple construction so retained within the unit that it may be readily disassembled so that access may be had to all parts thereof. Simply by removing the two screws 65, all parts of the pump and the passages connecting therewith may be reached. Moreover, when the pump and its parts are removed, the gearing in the unit is also readily accessible.

I claim as my invention:

1. In an outboard motor, an underwater unit comprising, in combination, a body portion, gearing housed within said body portion and comprising a vertical drive shaft, a horizontal propeller shaft, and a pair of bevel gears mounted on the respective shafts, a removable nose piece for said body portion, and a rotary pump housed within the nose piece and accessible upon removal of the nose piece with the bevel gear on the propeller shaft constituting a part of the pump.

2. In an outboard motor, an underwater unit comprising, in combination, a body portion, gearing housed within said body portion and comprising a vertical drive shaft, a horizontal propeller shaft, a bevel gear mounted on said drive shaft, a bevel gear meshing therewith and mounted on said propeller shaft, said last-mentioned bevel gear having a hub portion extending forwardly of the body portion, a nose piece for said body portion, and a sliding vane pump comprising a pump body mounted in the nose piece, and a vane slidably mounted in said hub portion.

3. In an outboard motor, an underwater unit comprising, in combination, a body portion, gearing housed within said body portion and comprising a vertical drive shaft, a horizontal propeller shaft, a bearing in said body portion for the propeller shaft with the latter projecting forwardly beyond said bearing, a bevel gear mounted on said drive shaft, a bevel gear meshing therewith and mounted on the forwardly projecting part of said propeller shaft with the hub portion of the gear extending forwardly of the body portion, a nose piece for said body portion, and a sliding vane pump comprising a pump body mounted in said nose piece, and a vane slidably mounted in said hub portion.

4. In an outboard motor, an underwater unit comprising, in combination, a body portion, gearing housed within said body portion including a gear mounted on a horizontal axis and having a hub portion projecting forwardly beyond the body portion, a nose piece for said housing, and a sliding vane pump comprising a pump body mounted in said nose piece and embracing the forwardly projecting hub portion, and a vane slidably mounted in said hub portion.

5. In an outboard motor, an underwater unit comprising, in combination, a body portion having an open front face, gearing constituting part of the motor drive housed within said body portion and including a gear having a forwardly projecting hub extending beyond the front face of the body portion, a nose piece for closing the front face of the body portion and detachably secured thereto, and a pump body fixed within the nose piece and embracing said forwardly projecting hub, said hub constituting the rotatable part of the pump, said nose piece and said pump body being removable as a unit whereby the rotatable and fixed parts of the pump are separated upon removal of the nose piece to render the parts fully accessible.

6. In an outboard motor, an underwater unit comprising, in combination, a body portion having an open front face, gearing constituting part of the motor drive housed within said body portion and including a gear having a forwardly projecting hub extendingbeyond the front face of the body portion, said hub having a transverse slot in its end face, a transversely sliding Vane mounted in said slot, a nose piece constituting a removable closure for the front face of the body portion, and a pump body xed within the nose piece and embracing said hub, said pump body having an internal bore cooperating with said vane with the hub and vane constituting the rotatable part of the pump, said nose piece and said pump body being removable as a unit whereby the rotatable and fixed parts of the pump are separated upon removal of the nose piece and the vane may be readily removed.

WILLIAM L. IQSSEL. 

